This delay is due to the extra polish and optimization the developers want to give the title following recent hands-on sessions with press and fans.

Marek Tyminski, CEO of CI Games, had the following to say about the delay:

We’re making an ambitious game and unfortunately still need an extra few months to make sure it will stand up to the expectations of the fans. Our goal is to ensure Sniper: Ghost Warrior 3 runs smoothly on all platforms, and right now we still have some important work left on optimizing the game. This is our biggest project we’ve ever worked on and the entire team is pushing really hard to make the entire experience more polished. I really hope everyone will understand our decision and will wait the extra time to play something we’re excited about, and that will redefine our IP and the sniping genre as a whole. This is a new beginning for the Sniper: Ghost Warrior series.